Psalms 105:36

As the believer commonly thrives best in his soul when under the cross; so the church also flourishes most in true holiness, and increases in number, while under persecution. Yet instruments shall be raised up for their deliverance, and plagues may be expected by persecutors. And see the special care God took of his people in the wilderness. All the benefits bestowed on Israel as a nation, were shadows of spiritual blessings with which we are blessed in Christ Jesus. Having redeemed us with his blood, restored our souls to holiness, and set us at liberty from Satan's bondage, he guides and guards us all the way. He satisfies our souls with the bread of heaven, and the water of life from the Rock of salvation, and will bring us safely to heaven. He redeems his servants from all iniquity, and purifies them unto himself, to be a peculiar people, zealous of good works.

Are smote also all the firstborn in their land, the chief of all their strength. Now came the master blow. The Lord spoke before, but now he smites; before he only smote vines, but now he strikes men themselves. The glory of the household dies in a single night, the prime and pick of the nation are cut off, the flower of the troops, the heirs of the rich, and the hopes of the poor all die at midnight. Now the target was struck in the centre, there was no confronting this plague. Pharaoh feels it as much as the woman slave at the mill: he had smitten Israel, the Lord's firstborn, and the Lord repaid him to his face. What a cry went up throughout the land of Egypt when every house wailed its firstborn at the dead of night! O Jehovah, thou didst triumph in that hour, and with an outstretched arm didst thou deliver thy people.